Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2 + Fe2O3)
mineral
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
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Swirled Agate Bead
Silicon Dioxide (SiO2)
mineral
Serpentine
Serpentinite (composed mainly of Group Minerals Antigorite, Chrysotile, and Lizardite; Mg3Si2O5(OH)4)
metamorphic
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (and Jasper/Flint variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Amethyst
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
mineral
Chert (specifically Black Chert or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Quartz in Matrix (Lepidolite or Quartzite)
Silicon Dioxide (SiO2) with host rock
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt Porphyry
Porphyritic Basalt
igneous
Quartz / Feldspar Specimen
SiO2 (Quartz) / KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar Group)
mineral
Jasper or Chert with Quartz Vugs
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Serpentine with quartz or calcite vein
Serpentinite; mainly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with a pale quartz/calcite vein
metamorphic
Chalcedony (Agate/Jasper mix)
Cryptocrystalline Sillimanite (Quartz) - SiO2
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartzite (River Pebble)
Metamorphic Quartzite (primarily SiO2)
metamorphic
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Silver (Jewelry form)
Native Silver (Ag)
mineral
Clear Quartz (Faceted)
SiO2 - Silicon Dioxide
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Tumbled Rose Quartz
Quartz (SiO2)
mineral
Chert (often called Flint)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
sedimentary
Lepidolite (likely)
K(Li,Al)3(Al,Si)4O10(F,OH)2 (Phyllosilicate mineral, part of the mica group)
Mineral
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz (Chalcedony/Agate)
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet Group (e.g., Almandine Fe3Al2(SiO4)3)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky or Yellow/Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartz
FeS2 (Iron Pyrite) with SiO2 (Quartz)
Mineral/Igneous/Hydrothermal